The service costs $9.99 per month for the basic plan and $14.99 for the family plan, but Apple is offering a free three-month trial.

To start using Apple Music, you'll need to update your iPhone to the latest software.

To do that, head over to the Settings menu on your iPhone and tap General. From there, select Software Update.

Now, your iPhone should tell you that there's a new software update available called iOS 8.4. Tap it to start installing the new software. If you're in a location with a stable Wi-Fi connection, such as at home or at work, we'd recommend connecting to Wi-Fi when installing the update to avoid using too much data.

You'll need to sign up for a subscription if you want to get access to all of Apple Music's features, such as the ability to listen to unlimited music, skip as many songs as you like, and save music for offline listening. If you don't sign up for a membership and sign in with your Apple ID, you'll still get to listen to the Beats 1 radio station, Apple's radio stations, and follow artists on Connect.

For more information on how to sign up for Apple Music and what the full membership includes, check out Apple's website here.